Cass County, Iowa ZIP codes
8 ZIP codes are in Cass County, plus 5 that cross in from neighboring counties.
- ZIP codes
- 8
- Population in these ZIPs
- 13,872
- Avg. median income
- $65,300population-weighted
- Cities & towns
- 8
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Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Cass County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 50020 | Anita | 1,197 | $75,417 | $168,400 |
| 50022 | Atlantic | 8,526 | $63,125 | $160,900 |
| 50274 | Wiota | 234 | $71,667 | $204,100 |
| 50843 | Cumberland | 540 | $56,125 | $181,900 |
| 50853 | Massena | 716 | $65,208 | $169,900 |
| 51535 | Griswold | 1,697 | $76,371 | $195,700 |
| 51544 | Lewis | 793 | $48,313 | $161,300 |
| 51552 | Marne | 169 | $90,000 | $190,200 |
ZIP codes partly in Cass County
These ZIP codes are mostly in a neighboring county but cover part of Cass County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 50042 | Brayton | Audubon County | 226 | $92,500 | $166,900 |
| 50837 | Bridgewater | Adair County | 282 | $63,000 | $116,700 |
| 50864 | Villisca | Montgomery County | 1,662 | $69,861 | $135,200 |
| 51532 | Elliott | Montgomery County | 644 | $65,375 | $150,600 |
| 51577 | Walnut | Pottawattamie County | 1,561 | $71,518 | $199,100 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Cass County
Nearby counties
Frequently asked questions
How many ZIP codes are in Cass County, Iowa?
8 ZIP codes are mainly in Cass County, and 5 more ZIP codes from neighboring areas reach partly into it.
What cities are in Cass County?
ZIP codes in Cass County use the city names Anita, Atlantic, Cumberland, Griswold, Lewis, Marne, Massena and Wiota.